I have got to disagree, the 16v turbo (8 injector - kstar) is an awesome car to drive and very reliable, I am rebuilding mine after over 10 years since I originally built the engine. I am only rebuilding the engine as a precaution since I am completely overhauling the entire car as the body was getting a bit shabby. It still runs fine but the timing chain is a bit noisy, so while I am at it its not that big a deal to change the seals in the head, decoke etc.
I have had lots of mk2's, the normally aspirated 16v is a great car, BUT with a turbo its awesome, the power delivery is unbelievable, I have hit the rev limiter in 5th gear, it just pulls and pulls and pulls. Musing a NOS kit for some extra fun at the moment, the car is a toy and I like gadgets!
The kstar does the job fine, I have absolutely no intention of changing it, alot of time was dedicated to mapping it properly, it had over a day on Stealth's rollers to get it setup right. I am not up to date on other management systems but I know that the kstar allows me to control fuel and ignition retard/advance at any point in the rev range, water injection keeps everything cool, it just works....